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courses:rg:2014:mdsm [2014/11/25 21:27]
nguyenti 		courses:rg:2014:mdsm [2014/11/29 13:52] (current)
popel
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-1. Recall from the paper presented by Tam 3 week ago.  +You should focus on the first paper (you can skip section 2.3): [[http://www.aclweb.org/anthology/W11-2503.pdf|Distributional semantics from text and images]]. 
-a. What is the difference between distributional semantic and distributed semantic representation? +The second paper [[http://www.aclweb.org/anthology/P12-1015.pdf|Distributional Semantics in Technicolor]], an extent of the first one, is optional reading.
-b. What is maximum size of word vector in distributional representation approach?+
  
-2. a. What is the vector representation of word "Moon" and "Sun" from co-occurrence matrix below:+ 
 +Q1.  
 +Recall the paper about word representations presented by Tam on November 10. 
 +Read http://www.quora.com/Whats-the-difference-between-distributed-and-distributional-semantic-representations 
 + 
 +(M_{w,d} is a matrix with w rows and d columns). 
 +What does w, d and k mean? 
 +What are the values of w, d and k used in the experiments in this paper? 
 + 
 +Q2. 
 +a) Compute the similarity between two words "Moon" and "Mars" from the co-occurrence matrix below. 
 +Use these raw counts (no Local Mutual Information, no normalization) and cosine similarity.
  
            | planet | night | full | shadow | shine                   | planet | night | full | shadow | shine       
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     Dog    |   0    |   19  |  2   |   11   |   1     Dog    |   0    |   19  |  2   |   11   |   1
     Mars   |   44   |   23  |  17  |   3    |   9     Mars   |   44   |   23  |  17  |   3    |   9
 +    
 +b) How do they deal with high dimension of vectors in those papers?
 +Can you suggest some (other) techniques of preprocessing vectors with high dimensions?
            
-3. What are Bag of Word (BOVW) and Bag of Visual Word (BOW)? Are they synonyms?+Q3.  
 +a) What are Bag of Word (BOVW) and Bag of Visual Word (BOW)? 
 +b) How do they apply BOVW to compute representation of a word (concept) from a large set of images? 
 +    
 +Q4 (bonus). 
 +When they construct text-based vectors of words from DM model 
 +they mentioned Local Mutual Information score. (section 3.2, also section 2.1 in the 2nd paper) 
 +So what is that score? Why did they use it?
  
-4. How do they apply BOVW to compute representation of a word (concept) +Q5 (bonus). 
-   from a large set of Images?+Have you ever wished to see beautiful "Mermaids"? 
 +Have you ever seen "Unicorns" in the real life? 
 +"Assume that there are no photos of them on the Internet"
  
-5. Have you ever wish to see a beautiful Mermaids. +Think about a computational way to show that how they look like?
-Have you ever seen "Unicorns" in the real lie. +
-Can you think a computational way to show that how they look like?+
  
  

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